Rhododendron 'Phyllis Korn', which is a Korn hybrid documented as 'Diane' x 'Gomer Waterer', has been determined to be a triploid using flow cytometry by
Dr. João Loureiro, Dr. Silvia Castro, José Cerca, and Mariana Castro
Plant Ecology and Evolution Group,
Centre for Functional Ecology,
Department of Life Sciences,
Faculty of Science and Technology,
University of Coimbra, Portugal.
'Phyllis Korn', which has 'Broughtonii', 'Diane', 'Pink Pearl', and 'Gomer Waterer' as ancestors, is documented as the pollen parent of 'Summer Peach', which has been determined to be a diploid. Jim Barlup produced several seedlings using 'Phyllis Korn' as the seed parent and 'Trude Webster' as the pollen parent.
'Phyllis Korn' is hardy in zone 6.
'Peach Recital' and 'Summer Wind' are diploid offspring of 'Summer Peach'.
'Trude Webster' has as ancestors 'Broughtonii', 'Pink Pearl', 'Cynthia', 'Countess of Derby' and has as descendants 'Platinum Pearl', 'Grand Slam', and 'Gentle Giant'
Summary of Ploidy Levels
Diploid 'Diane',
Diploid 'Madame Carvalho',
Diploid 'Mrs. Lindsay Smith',
Diploid 'Peach Recital',
Diploid 'Summer Peach',
Diploid 'Summer Wind',
Triploid 'Broughtonii',
Triploid 'Cynthia',
Triploid 'Gomer Waterer',
Triploid 'Platinum Pearl',
Triploid 'Phyllis Korn',
Triploid 'Pink Pearl',
Tetraploid 'Countess of Derby',
Tetraploid 'Gentle Giant',
Tetraploid 'Grand Slam',
Tetraploid 'Trude Webster'
Source: John and Sally Perkins
John and Sally Perkins
